1. w3schools.com
      THE WORLD'S LARGEST WEB DEVELOPER SITE

      SQL Tutorial

      SQL HOMESQL IntroSQL SyntaxSQL SelectSQL Select DistinctSQL WhereSQL And, Or, NotSQL Order BySQL Insert IntoSQL Null ValuesSQL UpdateSQL DeleteSQL Select TopSQL Min and MaxSQL Count, Avg, SumSQL LikeSQL WildcardsSQL InSQL BetweenSQL AliasesSQL JoinsSQL Inner JoinSQL Left JoinSQL Right JoinSQL Full JoinSQL Self JoinSQL UnionSQL Group BySQL HavingSQL ExistsSQL Any, AllSQL Select IntoSQL Insert Into SelectSQL CaseSQL Null FunctionsSQL Stored ProceduresSQL Comments

      SQL Database

      SQL Create DBSQL Drop DBSQL Backup DBSQL Create TableSQL Drop TableSQL Alter TableSQL ConstraintsSQL Not NullSQL UniqueSQL Primary KeySQL Foreign KeySQL CheckSQL DefaultSQL IndexSQL Auto IncrementSQL DatesSQL ViewsSQL InjectionSQL Hosting

      SQL References

      SQL KeywordsMySQL FunctionsSQL Server FunctionsMS Access FunctionsSQL OperatorsSQL Data TypesSQL Quick Ref

      SQL Examples

      SQL ExamplesSQL QuizSQL ExercisesSQL Certificate

      MySQL IF() Function

      ❮ MySQL Functions

      Example

      Return "YES" if the condition is TRUE, or "NO" if the condition is FALSE:

      SELECT IF(500<1000, "YES", "NO");
      Try it Yourself »

      Definition and Usage

      The IF() function returns a value if a condition is TRUE, or another value if a condition is FALSE.

      Syntax

      IF(condition, value_if_true, value_if_false)

      Parameter Values

      Parameter Description
      condition Required. The value to test
      value_if_true Optional. The value to return if condition is TRUE
      value_if_false Optional. The value to return if condition is FALSE

      Technical Details

      Works in: From MySQL 4.0

      More Examples

      Example

      Return 5 if the condition is TRUE, or 10 if the condition is FALSE:

      SELECT IF(500<1000, 5, 10);
      Try it Yourself »

      Example

      Test whether two strings are the same and return "YES" if they are, or "NO" if not:

      SELECT IF(STRCMP("hello","bye") = 0, "YES", "NO");
      Try it Yourself »

      Example

      Return "MORE" if the condition is TRUE, or "LESS" if the condition is FALSE:

      SELECT OrderID, Quantity, IF(Quantity>10, "MORE", "LESS")
      FROM OrderDetails;
      Try it Yourself »

      ❮ MySQL Functions

          1. http://www.mh8dociw.tw | http://m.mh8dociw.tw | http://wap.mh8dociw.tw | http://3g.mh8dociw.tw | http://4g.mh8dociw.tw | http://5g.mh8dociw.tw | http://mobile.mh8dociw.tw | http://vip.mh8dociw.tw | http://ios.mh8dociw.tw | http://anzhuo.mh8dociw.tw | http://6532.mh8dociw.tw | http://8768.mh8dociw.tw | http://c4b1.mh8dociw.tw | http://fd917.mh8dociw.tw | http://b79.mh8dociw.tw | http://0d03.mh8dociw.tw | 本网站受美国地方法保护